Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '8305e4b89d1ed553fd30d07afba6c2505e7f53b3d9c058fcb23498d3bc3abd92' 
  AND token = 'V1vbqX9lEVa3odWbsT5y7EnoXtePC+Sb9rXXZh91IyU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

{
  "query_block": {
    "select_id": 1,
    "message": "no matching row in const table"
  }
}